Aib-heating furnace



DAVID CULVER, OF HARTFORD, CONNEC'TICIUL.v

ynim-Huiurim .FUBNACE Specification of Letters Patenti No.v 5,114, dated May 15, 1847.

To all whom t may concern Be it known that I, DAVID CULVER, of thei city and county of Hartford and State of,v

' Connecticut, have invented new and useful Improvements in Hot-Air Furnaces forL Heating Buildings, &c., and that the fol lowing is a full, clear, and exact description of the principle or character which distin-y guishes them from all other things before known and of the manner of making, constructing, and using the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a plan of the base of the fur-j nace taken at a plane just above the grate;` Fig. 2, is an elevation; Fig. 3a cross sec-Q tion taken at the'line (a, a) of Fig. 2 (and represented in the drawing as lying down) Fig. 4, a horizontal section of the main radiator taken at the line (b, b) of Fig. 2; Fig. 5, a longitudinal vertical section taken at the line (c, c) of Fig. 1, and Fig. 6, aI top view of the exit pipe and flat radiator, the pipe and radiator being indicated by red lines to represent the internal arrange-f ment.

The same letters indicate like parts in all the figures. g

The object of my invention is to obtain afl large radiating surface with the view to gety the greatest amount of heat with a given, amount of fuel, and so to arrange the parts' that the inside l'may be kept clear of soot and ashes during the-operation ofthe fur-A nace; and the nature of my invention con-i sists in making the drum, placed immedi-I ately overthe fire, in the form of an hour glass, surrounded with 'a series of pipes the lower ends of which open into a chamber formed by an inverted hollow frustum of-a cone that vforms the connection between the iire pot and the drum, and their upper ends opening into a dome that extends over themv and the drum. And my invention consists also in placing a disk valve or swinging partition in the smallest part of the drum, the valve being properly balancedv and-hung on: journals and provided with a weightl attached vertically to its underside to,-a`ctlike a pendulum, or provided with any 4othermeans by which to keep it closed except when vibrated to discharge' .the soot and ashes which may accumulate on its upper surface. By this arrangement of parts the products of combustion in rising fromV the fire pot impinge onv the curved surface of ythe drum, (which as stated above is formed like an hour glass to `present a large surface), and against the valve, (which is kept closed lby the pendulous weight), and finding no escape they are deflected andpass up the vertical pipes into the upperpart of the` i.

drum and dome, which they heat, depositing the soot and ashes onto the valve 'or swinging partition, `and then pass through a horizontal pipe into one division ofk a flat radiator down to the base thereof and thence up the other division andout into the exit pipe, the arrangement of this fiat radiator in combination with Vthe circular `radiator constituting the third `part of my invention.

And kthe lastpart of my invention consists in uniting the horizontalvr and escape pipe with the top of the flat radiator by means of ,af globe or'spherey in combination with a round disk valve by means of which spherical enlargement and disk valve the apertureY c;

f or the passage of the products of combustion ris always of the full capacityjof the P119@-v t In the `accompanying drawings (A,` A)

represent the ash pan ,and base of the furi f nace. The top of this has a circular hole in which is hung a circular swinging grate (n, w) the spindle of which `passes out through the front and is there provided'with a handle (f) by means of which' the grate,.

can be operated/*to discharge thecontentsbf' the ire chamber into the ash pan, orto shake out the ashes. Over this grate is properly fitted the iire cylindery (Q) from the which is` iitted an inclined feederfCW) through which coal is supplied to the grate. lo the upper ed e of this inverted coneis vverted frustum of a cone (Z) to the side of litted a flat ring a) pierced all around near-. its outer periphery with v.holes (a, 0,) kto vion a dome. (Z).y And. to the inner periphery.,

of theserings istted and secured a drum f (M) made in the form ofan hour glass, yand to the smallest part of this is hung or .swung a horizontal disk valve from the under surface of which .hangs a weight (t) thatv l keeps the valve ina horizontal position and Y therefore closed,but as it is hung on journals the swinging of this weight by means of a poker through the feeder will swing the Valve and discharge any soot or ashes that may have accumulated on the surface fin consequence of the direction of the currents of the products of combustion, which pass up from the lire cylinder, as indicated by thevv will be discharged readily by simply vibrating the valve, a result that could notV be attained byA a fixed partition instead of the valve. Y

The end of the horizontal pipe- (P) connects with a flat vertical radiator (L) by an 'enlargement (m) a similar enlargement (m) from the back of the radiator opens into the exit pipe. These two enlargements are segments of a sphere or globe and in this istted a disk valve (Z) hung on a vertical spindle (k) provided with a lever or Vhandle (p) at top by which it can be turned." By locating the disk valve in this globe formed enlargement the apertures for the passage of the products of combustion are always retained of the same size, and therefore do not impede their passage as in `other furnaces or stoves. When this valve stands in the plane of the axis of the horizontal pipe t. (P) and the exit pipe the draft isdirectly out into the chimney, but when it is. turned in the position represented in Fig. (6) then the products of combustion pass down on;

Vone side of a vertical partition plate (bf) into a case (0, c) surrounded by water in a vessel (13,]3) to'produce asllght evaporation to moisten the air of a building, and

then the smoke, gases, &c. pass up the otherv side of the partition and out into the chimney, the diagonal position of the disk valve in the globe having the apertures of the pipes vSc-c. of theirffull capacity. This flat radiator ismade ,in two parts separated at the line (a, a) of Fig. 2, so that each halfV may be cast separately, and then put together in any desired manner. And to eil-1 large they radiating surface the two plates constituting this fiat radiator are made with flutes (d, cZ).

This apparatus may be used as represented in the drawings to answer the purposes of a stove, but when used as a furnace forheating air to be carriedoff for'heating other apartments, it must then be surrounded by a wall of masonry provided with pipes for admitting cold, and for discharg-` ing hot air, and as the mode "of surrounding a) into 'the furnacefor this purpose whichI employis similar to plans in general use it is deemed unnecessary to describe it.

' It will be evident from the foregoing that the disk valve or swinging partition (T) in the drum, over the re place, may be vi- 'brated by the pendulum in the manner described, ory by extending the spindle to which it is attached through to the outside of the drum that it maybe vibrated from the outside,or an arm'may extendup from the upper surface of the valve and connected with a sliding rod passing to the outside, in short `any,desired plan of operating this valve may be substituted `for the `pendulum which I prefer.l If desired the products of combustion instead ofbeingcarried out through a holein-the 'top of the drum, may be dischar ed'through a pipe extending out from-` lthe` rum just above the disk valveor partition.' And I wish it to be distinctly understood that some of the advantagesarising from the use of this valve or swinging partition maybe retained without the hour glass form of the drum, as this (the drum) may be made cylindrical or of any other desired form, and yet retain the valve vas a means of discharging the'soot or ashes, which in any such arrangement, under any `of its modifications, couldnot be effected without taking the apparatus apart-but the hour glass form ofthe drum presents a `much larger surface for the radiation of heat than any other form heretofore given and therefore is preferable Vto the cylindrical. What I claim as my invention and desire to secure by Letters Patent, is-` i 1. Making the Idrum which is placed over the re pot in the form of an hour glass t0.` present a-large amount of surface to the action of the flame and for radiation, asdescribed, when this is combined withthevertical pipes surrounding the y drum, as described.

2. I claim the employment of" the `disk 'valve or swinging partition within a vertical .drum placed'over the fire for the discharge Vof soot and ashes from the-compartment above the swinging partition, as described.

3.And nally I claimtheglobe formed enlargement at the junction of the pipes and the flat radiator in combination with the circular disk valvepor damper by means of which enlargement, in combination, the apertures for the passage of smoke&c. are retained of their fullcapacity. i l, DAVID CULVER; Witnesses:

` CHS." M. KELLEiz, i

Joran` VAN TYNE.-"" y 

